On 12 April 2011 12:50, Tom Marchant <m42tom-ibmm...@yahoo.com> wrote:
> "When you issue a PR, the system automatically deactivates all > ESTAE-type recovery routines that were previously activated under > that current linkage stack entry." How does the system know that you issued the PR? Certainly not every PR can come to the attention of system code; PR is an instruction that does not normally cause an interrupt and give the system the chance to examine things. So is the inactivation only discovered when it's needed? Tony "confused in Toronto" H.
